Aluminum alloy.



our sirens PATEN ore.

WILLIAM A. MQADAIVIS,- 0F BAY SHORE, l\TEW YORK.

ALIiMINUM ALLOY.

Specification of Letters Patent. Patented Nov. 2?, 19117.

No Drawing. Application filed April 15, 1914, Serial No. 832,050. Renewed May 1, 1917. Serial No. 165,799.

a specification.

My invention relates to an aluminum al by, with the object in vlew of providing a superior alloy suitable for castmg purposes,

- which will not tarnish and which will possees the qualities of great fluidity and strength.

With these ends in view, my invention consists in an alloy composed of aluminum, copper, zinc, antimony, and silver, in which, by weight, the amount of antimony exceeds the amount of silver, the amount of zinc exceeds the amount of antimony, the amount of copper exceeds the amount of zinc, and the amount of alumlnum exceeds the amount at a high heat. The copper is then added.

and then the silver isadded. The heat of the mass is then lowered andthc balance of the aluminum is added. The mass 1s agitated thoroughly and the temperature still further lowered to a dull red and then the zinc is added.

The mass is still thoroughly agitated and the scum removed and the mass may then be cast into ingots.

What I claim is 1. An aluminum alloy composed of aluminum, copper, zinc, antimony and silver, in which, by weight, the amount of antimony exceeds the amount of silver, the amount of zinc exceeds the amount of antimony, the amount of copper exceeds the amount of zinc, and the amount of aluminum exceeds the amount of copper.

2. An aluminum alloy composed of alu minum, copper, zinc, antimony and silver combined in substantially the following proportions "by weight; aluminum, one hundred parts; copper, seventeen parts; zinc, five parts; antimony one and one-half parts; and silver, one part. i

In testimony, that I Claim the foregoing as my invent on, I have signed my name in the presence of two witnesses, this fourteenth day of April, 1914.

' WILLIAM A. MoADAMS.

Witnesses:

F. GEORGE BARRY, Lina M. Eonnn'r. 

